TROUBLESHOOTING FLASH CODE 86
[b] If the resistance measurement is greater than 5 , or open, the return line (circuit
#952) is open. Repair the open and refer to section 86.3.9.
ECM Vehicle Harness Connector
Check Pressure Governor System Connectors
Perform the following steps to check the PGS connectors.
1. Inspect terminals at the PGS sensor connector (both the sensor and harness side) for
damage: bent, corroded, and unseated pins or sockets.
[a] If the terminals and connectors are damaged, repair them and refer to section 86.3.9.
[b] If the terminals and connectors are not damaged, replace the PGS sensor and
refer to section 86.3.9.
Check for Short to +5 Volts
Perform the following steps to check for a short to the +5 volts.
1. Turn ignition OFF.
2. Disconnect the vehicle harness connectors at the ECM.
3. Measure resistance between sockets A3 and D3 on the engine harness connector.
[a] If the resistance measurement is greater than 100
or open, refer to section 86.3.6.
[b] If the resistance measurement is less than or equal to 100 , the signal line (#749) is
shorted to the engine +5 volt line (#916). Repair the short and refer to section 86.3.9.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION